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build-sys: remove systemd-coredumpctl symlink
[thirdparty/systemd.git] / src / udev / udev-rules.c
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2232cac8 1/*
1298001e 2 * Copyright (C) 2003-2012 Kay Sievers <kay@vrfy.org>
2232cac8 3 *
55e9959b
KS		 4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
3d6d12c6 8 *
55e9959b
KS		 9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
2232cac8 13 *
55e9959b
KS		 14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
2232cac8
GKH		 16 */
17
18#include <stddef.h>
1449a55d 19#include <limits.h>
2232cac8 20#include <stdlib.h>
6d87ee2e 21#include <stdbool.h>
2232cac8
GKH		 22#include <string.h>
23#include <stdio.h>
24#include <fcntl.h>
25#include <ctype.h>
26#include <unistd.h>
27#include <errno.h>
5ee7ecfb 28#include <dirent.h>
cea61f5c 29#include <fnmatch.h>
959e8b5d 30#include <time.h>
2232cac8 31
2232cac8 32#include "udev.h"
9eb977db 33#include "path-util.h"
2c21044f 34#include "conf-files.h"
915bf0f6 35#include "strbuf.h"
84b6ad70 36#include "strv.h"
1291bc89 37#include "util.h"
2232cac8 38
a1525d17 39#define PREALLOC_TOKEN 2048
c7521974 40
4052400f 41struct uid_gid {
912541b0
KS		 42 unsigned int name_off;
43 union {
a1525d17
KS		 44 uid_t uid;
45 gid_t gid;
912541b0 46 };
4052400f
KS		 47};
48
2ad8416d
ZJS		 49static const char* const rules_dirs[] = {
50 "/etc/udev/rules.d",
51 "/run/udev/rules.d",
52 UDEVLIBEXECDIR "/rules.d",
53 NULL};
54
4052400f 55struct udev_rules {
912541b0 56 struct udev *udev;
97f2d76d 57 usec_t dirs_ts_usec;
912541b0
KS		 58 int resolve_names;
59
60 /* every key in the rules file becomes a token */
61 struct token *tokens;
62 unsigned int token_cur;
63 unsigned int token_max;
64
ab06eef8 65 /* all key strings are copied and de-duplicated in a single continuous string buffer */
915bf0f6 66 struct strbuf *strbuf;
912541b0
KS		 67
68 /* during rule parsing, uid/gid lookup results are cached */
69 struct uid_gid *uids;
70 unsigned int uids_cur;
71 unsigned int uids_max;
72 struct uid_gid *gids;
73 unsigned int gids_cur;
74 unsigned int gids_max;
4052400f
KS		 75};
76
915bf0f6
KS		 77static char *rules_str(struct udev_rules *rules, unsigned int off) {
78 return rules->strbuf->buf + off;
79}
80
81static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
82 return strbuf_add_string(rules->strbuf, s, strlen(s));
83}
84
1449a55d 85/* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
b0f7409f 86enum operation_type {
912541b0 87 OP_UNSET,
b0f7409f 88
912541b0
KS		 89 OP_MATCH,
90 OP_NOMATCH,
91 OP_MATCH_MAX,
b0f7409f 92
912541b0
KS		 93 OP_ADD,
94 OP_ASSIGN,
95 OP_ASSIGN_FINAL,
c7521974
KS		 96};
97
ac218d9c 98enum string_glob_type {
912541b0 99 GL_UNSET,
a1525d17 100 GL_PLAIN, /* no special chars */
912541b0 101 GL_GLOB, /* shell globs ?,*,[] */
a1525d17
KS		 102 GL_SPLIT, /* multi-value A|B */
103 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
104 GL_SOMETHING, /* commonly used "?*" */
ac218d9c
KS		 105};
106
32028733 107enum string_subst_type {
912541b0
KS		 108 SB_UNSET,
109 SB_NONE,
110 SB_FORMAT,
111 SB_SUBSYS,
32028733
KS		 112};
113
154a7b84 114/* tokens of a rule are sorted/handled in this order */
6880b25d 115enum token_type {
912541b0
KS		 116 TK_UNSET,
117 TK_RULE,
118
a1525d17
KS		 119 TK_M_ACTION, /* val */
120 TK_M_DEVPATH, /* val */
121 TK_M_KERNEL, /* val */
122 TK_M_DEVLINK, /* val */
123 TK_M_NAME, /* val */
124 TK_M_ENV, /* val, attr */
125 TK_M_TAG, /* val */
126 TK_M_SUBSYSTEM, /* val */
127 TK_M_DRIVER, /* val */
128 TK_M_WAITFOR, /* val */
129 TK_M_ATTR, /* val, attr */
912541b0
KS		 130
131 TK_M_PARENTS_MIN,
a1525d17 132 TK_M_KERNELS, /* val */
912541b0 133 TK_M_SUBSYSTEMS, /* val */
a1525d17
KS		 134 TK_M_DRIVERS, /* val */
135 TK_M_ATTRS, /* val, attr */
136 TK_M_TAGS, /* val */
912541b0
KS		 137 TK_M_PARENTS_MAX,
138
a1525d17 139 TK_M_TEST, /* val, mode_t */
a1525d17
KS		 140 TK_M_PROGRAM, /* val */
141 TK_M_IMPORT_FILE, /* val */
142 TK_M_IMPORT_PROG, /* val */
143 TK_M_IMPORT_BUILTIN, /* val */
144 TK_M_IMPORT_DB, /* val */
145 TK_M_IMPORT_CMDLINE, /* val */
146 TK_M_IMPORT_PARENT, /* val */
147 TK_M_RESULT, /* val */
912541b0
KS		 148 TK_M_MAX,
149
150 TK_A_STRING_ESCAPE_NONE,
151 TK_A_STRING_ESCAPE_REPLACE,
152 TK_A_DB_PERSIST,
a1525d17
KS		 153 TK_A_INOTIFY_WATCH, /* int */
154 TK_A_DEVLINK_PRIO, /* int */
155 TK_A_OWNER, /* val */
156 TK_A_GROUP, /* val */
157 TK_A_MODE, /* val */
158 TK_A_OWNER_ID, /* uid_t */
159 TK_A_GROUP_ID, /* gid_t */
160 TK_A_MODE_ID, /* mode_t */
84b6ad70 161 TK_A_TAG, /* val */
a1525d17 162 TK_A_STATIC_NODE, /* val */
c26547d6 163 TK_A_SECLABEL, /* val, attr */
a1525d17 164 TK_A_ENV, /* val, attr */
a1525d17
KS		 165 TK_A_NAME, /* val */
166 TK_A_DEVLINK, /* val */
167 TK_A_ATTR, /* val, attr */
83cd6b75
KS		 168 TK_A_RUN_BUILTIN, /* val, bool */
169 TK_A_RUN_PROGRAM, /* val, bool */
a1525d17 170 TK_A_GOTO, /* size_t */
912541b0
KS		 171
172 TK_END,
c7521974
KS		 173};
174
3f3aa9f5 175/* we try to pack stuff in a way that we take only 12 bytes per token */
4052400f 176struct token {
912541b0
KS		 177 union {
178 unsigned char type; /* same in rule and key */
179 struct {
180 enum token_type type:8;
181 bool can_set_name:1;
182 bool has_static_node:1;
183 unsigned int unused:6;
184 unsigned short token_count;
185 unsigned int label_off;
186 unsigned short filename_off;
187 unsigned short filename_line;
188 } rule;
189 struct {
190 enum token_type type:8;
191 enum operation_type op:8;
192 enum string_glob_type glob:8;
193 enum string_subst_type subst:4;
194 enum string_subst_type attrsubst:4;
195 unsigned int value_off;
196 union {
197 unsigned int attr_off;
912541b0
KS		 198 unsigned int rule_goto;
199 mode_t mode;
200 uid_t uid;
201 gid_t gid;
202 int devlink_prio;
912541b0
KS		 203 int watch;
204 enum udev_builtin_cmd builtin_cmd;
205 };
206 } key;
207 };
4052400f
KS		 208};
209
912541b0 210#define MAX_TK 64
4052400f 211struct rule_tmp {
912541b0
KS		 212 struct udev_rules *rules;
213 struct token rule;
214 struct token token[MAX_TK];
215 unsigned int token_cur;
4052400f
KS		 216};
217
baa30fbc 218#ifdef DEBUG
5d6a1fa6
KS		 219static const char *operation_str(enum operation_type type)
220{
912541b0 221 static const char *operation_strs[] = {
a1525d17
KS		 222 [OP_UNSET] = "UNSET",
223 [OP_MATCH] = "match",
224 [OP_NOMATCH] = "nomatch",
912541b0
KS		 225 [OP_MATCH_MAX] = "MATCH_MAX",
226
a1525d17
KS		 227 [OP_ADD] = "add",
228 [OP_ASSIGN] = "assign",
229 [OP_ASSIGN_FINAL] = "assign-final",
912541b0
KS		 230} ;
231
232 return operation_strs[type];
5d6a1fa6 233}
4052400f 234
5d6a1fa6
KS		 235static const char *string_glob_str(enum string_glob_type type)
236{
912541b0 237 static const char *string_glob_strs[] = {
a1525d17
KS		 238 [GL_UNSET] = "UNSET",
239 [GL_PLAIN] = "plain",
240 [GL_GLOB] = "glob",
241 [GL_SPLIT] = "split",
242 [GL_SPLIT_GLOB] = "split-glob",
243 [GL_SOMETHING] = "split-glob",
912541b0
KS		 244 };
245
246 return string_glob_strs[type];
5d6a1fa6
KS		 247}
248
249static const char *token_str(enum token_type type)
250{
912541b0 251 static const char *token_strs[] = {
a1525d17
KS		 252 [TK_UNSET] = "UNSET",
253 [TK_RULE] = "RULE",
912541b0 254
a1525d17 255 [TK_M_ACTION] = "M ACTION",
912541b0 256 [TK_M_DEVPATH] = "M DEVPATH",
a1525d17 257 [TK_M_KERNEL] = "M KERNEL",
912541b0 258 [TK_M_DEVLINK] = "M DEVLINK",
a1525d17
KS		 259 [TK_M_NAME] = "M NAME",
260 [TK_M_ENV] = "M ENV",
261 [TK_M_TAG] = "M TAG",
262 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
263 [TK_M_DRIVER] = "M DRIVER",
912541b0 264 [TK_M_WAITFOR] = "M WAITFOR",
a1525d17 265 [TK_M_ATTR] = "M ATTR",
912541b0 266
a1525d17 267 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
912541b0 268 [TK_M_KERNELS] = "M KERNELS",
a1525d17 269 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
912541b0 270 [TK_M_DRIVERS] = "M DRIVERS",
a1525d17
KS		 271 [TK_M_ATTRS] = "M ATTRS",
272 [TK_M_TAGS] = "M TAGS",
273 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
912541b0 274
a1525d17 275 [TK_M_TEST] = "M TEST",
912541b0 276 [TK_M_PROGRAM] = "M PROGRAM",
a1525d17
KS		 277 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
278 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
279 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
280 [TK_M_IMPORT_DB] = "M IMPORT_DB",
281 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
282 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
283 [TK_M_RESULT] = "M RESULT",
284 [TK_M_MAX] = "M MAX",
285
286 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
287 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
288 [TK_A_DB_PERSIST] = "A DB_PERSIST",
289 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
290 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
291 [TK_A_OWNER] = "A OWNER",
292 [TK_A_GROUP] = "A GROUP",
293 [TK_A_MODE] = "A MODE",
294 [TK_A_OWNER_ID] = "A OWNER_ID",
295 [TK_A_GROUP_ID] = "A GROUP_ID",
296 [TK_A_STATIC_NODE] = "A STATIC_NODE",
c26547d6 297 [TK_A_SECLABEL] = "A SECLABEL",
912541b0 298 [TK_A_MODE_ID] = "A MODE_ID",
a1525d17
KS		 299 [TK_A_ENV] = "A ENV",
300 [TK_A_TAG] = "A ENV",
301 [TK_A_NAME] = "A NAME",
912541b0 302 [TK_A_DEVLINK] = "A DEVLINK",
a1525d17 303 [TK_A_ATTR] = "A ATTR",
83cd6b75
KS		 304 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
305 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
a1525d17 306 [TK_A_GOTO] = "A GOTO",
912541b0 307
a1525d17 308 [TK_END] = "END",
912541b0
KS		 309 };
310
311 return token_strs[type];
5d6a1fa6 312}
c7521974 313
4052400f
KS		 314static void dump_token(struct udev_rules *rules, struct token *token)
315{
912541b0
KS		 316 enum token_type type = token->type;
317 enum operation_type op = token->key.op;
318 enum string_glob_type glob = token->key.glob;
915bf0f6 319 const char *value = str(rules, token->key.value_off);
912541b0
KS		 320 const char *attr = &rules->buf[token->key.attr_off];
321
322 switch (type) {
323 case TK_RULE:
324 {
325 const char *tks_ptr = (char *)rules->tokens;
326 const char *tk_ptr = (char *)token;
327 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
328
9f6445e3 329 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'",
baa30fbc
KS		 330 &rules->buf[token->rule.filename_off], token->rule.filename_line,
331 idx, token->rule.token_count,
332 &rules->buf[token->rule.label_off]);
912541b0
KS		 333 break;
334 }
335 case TK_M_ACTION:
336 case TK_M_DEVPATH:
337 case TK_M_KERNEL:
338 case TK_M_SUBSYSTEM:
339 case TK_M_DRIVER:
340 case TK_M_WAITFOR:
341 case TK_M_DEVLINK:
342 case TK_M_NAME:
343 case TK_M_KERNELS:
344 case TK_M_SUBSYSTEMS:
345 case TK_M_DRIVERS:
346 case TK_M_TAGS:
347 case TK_M_PROGRAM:
348 case TK_M_IMPORT_FILE:
349 case TK_M_IMPORT_PROG:
350 case TK_M_IMPORT_DB:
351 case TK_M_IMPORT_CMDLINE:
352 case TK_M_IMPORT_PARENT:
353 case TK_M_RESULT:
354 case TK_A_NAME:
355 case TK_A_DEVLINK:
356 case TK_A_OWNER:
357 case TK_A_GROUP:
358 case TK_A_MODE:
83cd6b75
KS		 359 case TK_A_RUN_BUILTIN:
360 case TK_A_RUN_PROGRAM:
9f6445e3 361 log_debug("%s %s '%s'(%s)",
baa30fbc 362 token_str(type), operation_str(op), value, string_glob_str(glob));
912541b0
KS		 363 break;
364 case TK_M_IMPORT_BUILTIN:
9f6445e3 365 log_debug("%s %i '%s'", token_str(type), token->key.builtin_cmd, value);
912541b0
KS		 366 break;
367 case TK_M_ATTR:
368 case TK_M_ATTRS:
369 case TK_M_ENV:
370 case TK_A_ATTR:
371 case TK_A_ENV:
9f6445e3 372 log_debug("%s %s '%s' '%s'(%s)",
baa30fbc 373 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
912541b0
KS		 374 break;
375 case TK_M_TAG:
376 case TK_A_TAG:
9f6445e3 377 log_debug("%s %s '%s'", token_str(type), operation_str(op), value);
912541b0
KS		 378 break;
379 case TK_A_STRING_ESCAPE_NONE:
380 case TK_A_STRING_ESCAPE_REPLACE:
381 case TK_A_DB_PERSIST:
9f6445e3 382 log_debug("%s", token_str(type));
912541b0
KS		 383 break;
384 case TK_M_TEST:
9f6445e3 385 log_debug("%s %s '%s'(%s) %#o",
baa30fbc 386 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
912541b0
KS		 387 break;
388 case TK_A_INOTIFY_WATCH:
9f6445e3 389 log_debug("%s %u", token_str(type), token->key.watch);
912541b0
KS		 390 break;
391 case TK_A_DEVLINK_PRIO:
9f6445e3 392 log_debug("%s %u", token_str(type), token->key.devlink_prio);
912541b0
KS		 393 break;
394 case TK_A_OWNER_ID:
9f6445e3 395 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.uid);
912541b0
KS		 396 break;
397 case TK_A_GROUP_ID:
9f6445e3 398 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.gid);
912541b0
KS		 399 break;
400 case TK_A_MODE_ID:
9f6445e3 401 log_debug("%s %s %#o", token_str(type), operation_str(op), token->key.mode);
912541b0
KS		 402 break;
403 case TK_A_STATIC_NODE:
9f6445e3 404 log_debug("%s '%s'", token_str(type), value);
912541b0 405 break;
c26547d6 406 case TK_A_SECLABEL:
9f6445e3 407 log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value);
c26547d6 408 break;
912541b0 409 case TK_A_GOTO:
9f6445e3 410 log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto);
912541b0
KS		 411 break;
412 case TK_END:
9f6445e3 413 log_debug("* %s", token_str(type));
912541b0
KS		 414 break;
415 case TK_M_PARENTS_MIN:
416 case TK_M_PARENTS_MAX:
417 case TK_M_MAX:
418 case TK_UNSET:
9f6445e3 419 log_debug("unknown type %u", type);
912541b0
KS		 420 break;
421 }
4052400f 422}
154a7b84 423
4052400f
KS		 424static void dump_rules(struct udev_rules *rules)
425{
912541b0
KS		 426 unsigned int i;
427
9f6445e3 428 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings",
baa30fbc
KS		 429 rules->token_cur,
430 rules->token_cur * sizeof(struct token),
431 rules->buf_count,
432 rules->buf_cur);
f168c273 433 for (i = 0; i < rules->token_cur; i++)
912541b0 434 dump_token(rules, &rules->tokens[i]);
4052400f
KS		 435}
436#else
4052400f
KS		 437static inline void dump_token(struct udev_rules *rules, struct token *token) {}
438static inline void dump_rules(struct udev_rules *rules) {}
baa30fbc 439#endif /* DEBUG */
c7521974 440
1449a55d
AJ		 441static int add_token(struct udev_rules *rules, struct token *token)
442{
912541b0
KS		 443 /* grow buffer if needed */
444 if (rules->token_cur+1 >= rules->token_max) {
445 struct token *tokens;
446 unsigned int add;
447
448 /* double the buffer size */
449 add = rules->token_max;
450 if (add < 8)
451 add = 8;
452
453 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
454 if (tokens == NULL)
455 return -1;
912541b0
KS		 456 rules->tokens = tokens;
457 rules->token_max += add;
458 }
459 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
460 rules->token_cur++;
461 return 0;
c7521974 462}
a27cd06c 463
154a7b84
KS		 464static uid_t add_uid(struct udev_rules *rules, const char *owner)
465{
912541b0
KS		 466 unsigned int i;
467 uid_t uid;
468 unsigned int off;
469
470 /* lookup, if we know it already */
471 for (i = 0; i < rules->uids_cur; i++) {
472 off = rules->uids[i].name_off;
915bf0f6 473 if (streq(rules_str(rules, off), owner)) {
912541b0 474 uid = rules->uids[i].uid;
912541b0
KS		 475 return uid;
476 }
477 }
478 uid = util_lookup_user(rules->udev, owner);
479
480 /* grow buffer if needed */
481 if (rules->uids_cur+1 >= rules->uids_max) {
482 struct uid_gid *uids;
483 unsigned int add;
484
485 /* double the buffer size */
486 add = rules->uids_max;
487 if (add < 1)
488 add = 8;
489
490 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
491 if (uids == NULL)
492 return uid;
912541b0
KS		 493 rules->uids = uids;
494 rules->uids_max += add;
495 }
496 rules->uids[rules->uids_cur].uid = uid;
915bf0f6 497 off = rules_add_string(rules, owner);
912541b0
KS		 498 if (off <= 0)
499 return uid;
500 rules->uids[rules->uids_cur].name_off = off;
501 rules->uids_cur++;
502 return uid;
154a7b84
KS		 503}
504
505static gid_t add_gid(struct udev_rules *rules, const char *group)
506{
912541b0
KS		 507 unsigned int i;
508 gid_t gid;
509 unsigned int off;
510
511 /* lookup, if we know it already */
512 for (i = 0; i < rules->gids_cur; i++) {
513 off = rules->gids[i].name_off;
915bf0f6 514 if (streq(rules_str(rules, off), group)) {
912541b0 515 gid = rules->gids[i].gid;
912541b0
KS		 516 return gid;
517 }
518 }
519 gid = util_lookup_group(rules->udev, group);
520
521 /* grow buffer if needed */
522 if (rules->gids_cur+1 >= rules->gids_max) {
523 struct uid_gid *gids;
524 unsigned int add;
525
526 /* double the buffer size */
527 add = rules->gids_max;
528 if (add < 1)
529 add = 8;
530
531 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
532 if (gids == NULL)
533 return gid;
912541b0
KS		 534 rules->gids = gids;
535 rules->gids_max += add;
536 }
537 rules->gids[rules->gids_cur].gid = gid;
915bf0f6 538 off = rules_add_string(rules, group);
912541b0
KS		 539 if (off <= 0)
540 return gid;
541 rules->gids[rules->gids_cur].name_off = off;
542 rules->gids_cur++;
543 return gid;
154a7b84
KS		 544}
545
bb144ed1 546static int import_property_from_string(struct udev_device *dev, char *line)
bd0ed2ff 547{
912541b0
KS		 548 char *key;
549 char *val;
550 size_t len;
0aa5b4d1 551 struct udev_list_entry *entry;
912541b0
KS		 552
553 /* find key */
554 key = line;
555 while (isspace(key[0]))
556 key++;
557
558 /* comment or empty line */
559 if (key[0] == '#' || key[0] == '\0')
560 return -1;
561
562 /* split key/value */
563 val = strchr(key, '=');
564 if (val == NULL)
565 return -1;
566 val[0] = '\0';
567 val++;
568
569 /* find value */
570 while (isspace(val[0]))
571 val++;
572
573 /* terminate key */
574 len = strlen(key);
575 if (len == 0)
576 return -1;
577 while (isspace(key[len-1]))
578 len--;
579 key[len] = '\0';
580
581 /* terminate value */
582 len = strlen(val);
583 if (len == 0)
584 return -1;
585 while (isspace(val[len-1]))
586 len--;
587 val[len] = '\0';
588
589 if (len == 0)
590 return -1;
591
592 /* unquote */
593 if (val[0] == '"' || val[0] == '\'') {
594 if (val[len-1] != val[0]) {
9f6445e3 595 log_debug("inconsistent quoting: '%s', skip", line);
912541b0
KS		 596 return -1;
597 }
598 val[len-1] = '\0';
599 val++;
600 }
601
0aa5b4d1
KS		 602 entry = udev_device_add_property(dev, key, val);
603 /* store in db, skip private keys */
604 if (key[0] != '.')
605 udev_list_entry_set_num(entry, true);
606
912541b0 607 return 0;
be4bedd1
KS		 608}
609
6880b25d 610static int import_file_into_properties(struct udev_device *dev, const char *filename)
be4bedd1 611{
912541b0
KS		 612 FILE *f;
613 char line[UTIL_LINE_SIZE];
614
47ef94ac 615 f = fopen(filename, "re");
912541b0
KS		 616 if (f == NULL)
617 return -1;
618 while (fgets(line, sizeof(line), f) != NULL)
619 import_property_from_string(dev, line);
620 fclose(f);
621 return 0;
bd0ed2ff
KS		 622}
623
dd5eddd2
KS		 624static int import_program_into_properties(struct udev_event *event,
625 usec_t timeout_usec,
626 const char *program, const sigset_t *sigmask) {
912541b0
KS		 627 struct udev_device *dev = event->dev;
628 char **envp;
629 char result[UTIL_LINE_SIZE];
630 char *line;
631 int err;
632
633 envp = udev_device_get_properties_envp(dev);
dd5eddd2 634 err = udev_event_spawn(event, timeout_usec, program, envp, sigmask, result, sizeof(result));
912541b0
KS		 635 if (err < 0)
636 return err;
637
638 line = result;
639 while (line != NULL) {
640 char *pos;
641
642 pos = strchr(line, '\n');
643 if (pos != NULL) {
644 pos[0] = '\0';
645 pos = &pos[1];
646 }
647 import_property_from_string(dev, line);
648 line = pos;
649 }
650 return 0;
319c6700
KS		 651}
652
6880b25d 653static int import_parent_into_properties(struct udev_device *dev, const char *filter)
0bfb84e1 654{
912541b0
KS		 655 struct udev_device *dev_parent;
656 struct udev_list_entry *list_entry;
657
658 dev_parent = udev_device_get_parent(dev);
659 if (dev_parent == NULL)
660 return -1;
661
912541b0
KS		 662 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
663 const char *key = udev_list_entry_get_name(list_entry);
664 const char *val = udev_list_entry_get_value(list_entry);
665
666 if (fnmatch(filter, key, 0) == 0) {
667 struct udev_list_entry *entry;
668
912541b0
KS		 669 entry = udev_device_add_property(dev, key, val);
670 /* store in db, skip private keys */
671 if (key[0] != '.')
672 udev_list_entry_set_num(entry, true);
673 }
674 }
675 return 0;
e2ecb34f
KS		 676}
677
912541b0 678#define WAIT_LOOP_PER_SECOND 50
6880b25d 679static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
b2fe4b9a 680{
912541b0
KS		 681 char filepath[UTIL_PATH_SIZE];
682 char devicepath[UTIL_PATH_SIZE];
683 struct stat stats;
684 int loop = timeout * WAIT_LOOP_PER_SECOND;
685
686 /* a relative path is a device attribute */
687 devicepath[0] = '\0';
688 if (file[0] != '/') {
d5a89d7d
KS		 689 strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
690 strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
912541b0
KS		 691 file = filepath;
692 }
693
912541b0
KS		 694 while (--loop) {
695 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
696
697 /* lookup file */
698 if (stat(file, &stats) == 0) {
9f6445e3 699 log_debug("file '%s' appeared after %i loops", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
912541b0
KS		 700 return 0;
701 }
702 /* make sure, the device did not disappear in the meantime */
703 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
9f6445e3 704 log_debug("device disappeared while waiting for '%s'", file);
912541b0
KS		 705 return -2;
706 }
9f6445e3 707 log_debug("wait for '%s' for %i mseconds", file, 1000 / WAIT_LOOP_PER_SECOND);
912541b0
KS		 708 nanosleep(&duration, NULL);
709 }
9f6445e3 710 log_debug("waiting for '%s' failed", file);
912541b0 711 return -1;
b2fe4b9a
KS		 712}
713
0ea5e96e
KS		 714static int attr_subst_subdir(char *attr, size_t len)
715{
912541b0
KS		 716 bool found = false;
717
718 if (strstr(attr, "/*/")) {
719 char *pos;
720 char dirname[UTIL_PATH_SIZE];
721 const char *tail;
722 DIR *dir;
723
d5a89d7d 724 strscpy(dirname, sizeof(dirname), attr);
912541b0
KS		 725 pos = strstr(dirname, "/*/");
726 if (pos == NULL)
727 return -1;
728 pos[0] = '\0';
729 tail = &pos[2];
730 dir = opendir(dirname);
731 if (dir != NULL) {
732 struct dirent *dent;
733
734 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
735 struct stat stats;
736
737 if (dent->d_name[0] == '.')
738 continue;
d5a89d7d 739 strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
912541b0
KS		 740 if (stat(attr, &stats) == 0) {
741 found = true;
742 break;
743 }
744 }
745 closedir(dir);
746 }
747 }
748
749 return found;
0ea5e96e
KS		 750}
751
b0f7409f 752static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
a0e5382d 753{
912541b0
KS		 754 char *linepos;
755 char *temp;
756
757 linepos = *line;
758 if (linepos == NULL || linepos[0] == '\0')
759 return -1;
760
761 /* skip whitespace */
762 while (isspace(linepos[0]) || linepos[0] == ',')
763 linepos++;
764
765 /* get the key */
766 if (linepos[0] == '\0')
767 return -1;
768 *key = linepos;
769
770 for (;;) {
771 linepos++;
772 if (linepos[0] == '\0')
773 return -1;
774 if (isspace(linepos[0]))
775 break;
776 if (linepos[0] == '=')
777 break;
778 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
779 if (linepos[1] == '=')
780 break;
781 }
782
783 /* remember end of key */
784 temp = linepos;
785
786 /* skip whitespace after key */
787 while (isspace(linepos[0]))
788 linepos++;
789 if (linepos[0] == '\0')
790 return -1;
791
792 /* get operation type */
793 if (linepos[0] == '=' && linepos[1] == '=') {
794 *op = OP_MATCH;
795 linepos += 2;
796 } else if (linepos[0] == '!' && linepos[1] == '=') {
797 *op = OP_NOMATCH;
798 linepos += 2;
799 } else if (linepos[0] == '+' && linepos[1] == '=') {
800 *op = OP_ADD;
801 linepos += 2;
802 } else if (linepos[0] == '=') {
803 *op = OP_ASSIGN;
804 linepos++;
805 } else if (linepos[0] == ':' && linepos[1] == '=') {
806 *op = OP_ASSIGN_FINAL;
807 linepos += 2;
808 } else
809 return -1;
810
811 /* terminate key */
812 temp[0] = '\0';
813
814 /* skip whitespace after operator */
815 while (isspace(linepos[0]))
816 linepos++;
817 if (linepos[0] == '\0')
818 return -1;
819
820 /* get the value */
821 if (linepos[0] == '"')
822 linepos++;
823 else
824 return -1;
825 *value = linepos;
826
827 /* terminate */
828 temp = strchr(linepos, '"');
829 if (!temp)
830 return -1;
831 temp[0] = '\0';
832 temp++;
912541b0
KS		 833
834 /* move line to next key */
835 *line = temp;
836 return 0;
6880b25d 837}
95776dc6 838
6880b25d 839/* extract possible KEY{attr} */
04a9d3a0 840static const char *get_key_attribute(struct udev *udev, char *str)
6880b25d 841{
912541b0
KS		 842 char *pos;
843 char *attr;
844
845 attr = strchr(str, '{');
846 if (attr != NULL) {
847 attr++;
848 pos = strchr(attr, '}');
849 if (pos == NULL) {
9f6445e3 850 log_error("missing closing brace for format");
912541b0
KS		 851 return NULL;
852 }
853 pos[0] = '\0';
912541b0
KS		 854 return attr;
855 }
856 return NULL;
6880b25d 857}
95776dc6 858
0ef254d5 859static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
912541b0
KS		 860 enum operation_type op,
861 const char *value, const void *data)
6880b25d 862{
912541b0
KS		 863 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
864 const char *attr = NULL;
865
29804cc1 866 memzero(token, sizeof(struct token));
912541b0
KS		 867
868 switch (type) {
869 case TK_M_ACTION:
870 case TK_M_DEVPATH:
871 case TK_M_KERNEL:
872 case TK_M_SUBSYSTEM:
873 case TK_M_DRIVER:
874 case TK_M_WAITFOR:
875 case TK_M_DEVLINK:
876 case TK_M_NAME:
877 case TK_M_KERNELS:
878 case TK_M_SUBSYSTEMS:
879 case TK_M_DRIVERS:
880 case TK_M_TAGS:
881 case TK_M_PROGRAM:
882 case TK_M_IMPORT_FILE:
883 case TK_M_IMPORT_PROG:
884 case TK_M_IMPORT_DB:
885 case TK_M_IMPORT_CMDLINE:
886 case TK_M_IMPORT_PARENT:
887 case TK_M_RESULT:
888 case TK_A_OWNER:
889 case TK_A_GROUP:
890 case TK_A_MODE:
8a173387 891 case TK_A_DEVLINK:
912541b0
KS		 892 case TK_A_NAME:
893 case TK_A_GOTO:
894 case TK_M_TAG:
895 case TK_A_TAG:
d6f116a7 896 case TK_A_STATIC_NODE:
915bf0f6 897 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 898 break;
899 case TK_M_IMPORT_BUILTIN:
915bf0f6 900 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 901 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
902 break;
903 case TK_M_ENV:
904 case TK_M_ATTR:
905 case TK_M_ATTRS:
906 case TK_A_ATTR:
907 case TK_A_ENV:
c26547d6 908 case TK_A_SECLABEL:
912541b0 909 attr = data;
915bf0f6
KS		 910 token->key.value_off = rules_add_string(rule_tmp->rules, value);
911 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
912541b0 912 break;
912541b0 913 case TK_M_TEST:
915bf0f6 914 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 915 if (data != NULL)
916 token->key.mode = *(mode_t *)data;
917 break;
918 case TK_A_STRING_ESCAPE_NONE:
919 case TK_A_STRING_ESCAPE_REPLACE:
920 case TK_A_DB_PERSIST:
921 break;
83cd6b75 922 case TK_A_RUN_BUILTIN:
83cd6b75 923 case TK_A_RUN_PROGRAM:
4590cfe4 924 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
915bf0f6 925 token->key.value_off = rules_add_string(rule_tmp->rules, value);
912541b0
KS		 926 break;
927 case TK_A_INOTIFY_WATCH:
928 case TK_A_DEVLINK_PRIO:
929 token->key.devlink_prio = *(int *)data;
930 break;
931 case TK_A_OWNER_ID:
932 token->key.uid = *(uid_t *)data;
933 break;
934 case TK_A_GROUP_ID:
935 token->key.gid = *(gid_t *)data;
936 break;
937 case TK_A_MODE_ID:
938 token->key.mode = *(mode_t *)data;
939 break;
912541b0
KS		 940 case TK_RULE:
941 case TK_M_PARENTS_MIN:
942 case TK_M_PARENTS_MAX:
943 case TK_M_MAX:
944 case TK_END:
945 case TK_UNSET:
9f6445e3 946 log_error("wrong type %u", type);
912541b0
KS		 947 return -1;
948 }
949
950 if (value != NULL && type < TK_M_MAX) {
951 /* check if we need to split or call fnmatch() while matching rules */
952 enum string_glob_type glob;
953 int has_split;
954 int has_glob;
955
956 has_split = (strchr(value, '|') != NULL);
e3e0314b 957 has_glob = string_is_glob(value);
912541b0
KS		 958 if (has_split && has_glob) {
959 glob = GL_SPLIT_GLOB;
960 } else if (has_split) {
961 glob = GL_SPLIT;
962 } else if (has_glob) {
33502ffe 963 if (streq(value, "?*"))
912541b0
KS		 964 glob = GL_SOMETHING;
965 else
966 glob = GL_GLOB;
967 } else {
968 glob = GL_PLAIN;
969 }
970 token->key.glob = glob;
971 }
972
973 if (value != NULL && type > TK_M_MAX) {
974 /* check if assigned value has substitution chars */
975 if (value[0] == '[')
976 token->key.subst = SB_SUBSYS;
977 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
978 token->key.subst = SB_FORMAT;
979 else
980 token->key.subst = SB_NONE;
981 }
982
983 if (attr != NULL) {
d6f116a7 984 /* check if property/attribute name has substitution chars */
912541b0
KS		 985 if (attr[0] == '[')
986 token->key.attrsubst = SB_SUBSYS;
987 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
988 token->key.attrsubst = SB_FORMAT;
989 else
990 token->key.attrsubst = SB_NONE;
991 }
992
993 token->key.type = type;
994 token->key.op = op;
995 rule_tmp->token_cur++;
8fef0ff2 996 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
9f6445e3 997 log_error("temporary rule array too small");
912541b0
KS		 998 return -1;
999 }
1000 return 0;
6880b25d 1001}
e57e7bc1 1002
6880b25d
KS		 1003static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1004{
912541b0
KS		 1005 unsigned int i;
1006 unsigned int start = 0;
1007 unsigned int end = rule_tmp->token_cur;
1008
1009 for (i = 0; i < rule_tmp->token_cur; i++) {
1010 enum token_type next_val = TK_UNSET;
1011 unsigned int next_idx = 0;
1012 unsigned int j;
1013
1014 /* find smallest value */
1015 for (j = start; j < end; j++) {
1016 if (rule_tmp->token[j].type == TK_UNSET)
1017 continue;
1018 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1019 next_val = rule_tmp->token[j].type;
1020 next_idx = j;
1021 }
1022 }
1023
1024 /* add token and mark done */
1025 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1026 return -1;
1027 rule_tmp->token[next_idx].type = TK_UNSET;
1028
1029 /* shrink range */
1030 if (next_idx == start)
1031 start++;
1032 if (next_idx+1 == end)
1033 end--;
1034 }
1035 return 0;
724257d9
GKH		 1036}
1037
6880b25d 1038static int add_rule(struct udev_rules *rules, char *line,
912541b0 1039 const char *filename, unsigned int filename_off, unsigned int lineno)
724257d9 1040{
912541b0 1041 char *linepos;
04a9d3a0 1042 const char *attr;
912541b0
KS		 1043 struct rule_tmp rule_tmp;
1044
29804cc1 1045 memzero(&rule_tmp, sizeof(struct rule_tmp));
912541b0
KS		 1046 rule_tmp.rules = rules;
1047 rule_tmp.rule.type = TK_RULE;
775f8b3c
KS		 1048 /* the offset in the rule is limited to unsigned short */
1049 if (filename_off < USHRT_MAX)
1050 rule_tmp.rule.rule.filename_off = filename_off;
912541b0
KS		 1051 rule_tmp.rule.rule.filename_line = lineno;
1052
1053 linepos = line;
1054 for (;;) {
1055 char *key;
1056 char *value;
1057 enum operation_type op;
1058
e736cf35 1059 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
3cf0f8f7
DR		 1060 /* Avoid erroring on trailing whitespace. This is probably rare
1061 * so save the work for the error case instead of always trying
1062 * to strip the trailing whitespace with strstrip(). */
1063 while (isblank(*linepos))
1064 linepos++;
1065
e736cf35
DR		 1066 /* If we aren't at the end of the line, this is a parsing error.
1067 * Make a best effort to describe where the problem is. */
1291bc89
ZJS		 1068 if (*linepos != '\n') {
1069 char buf[2] = {linepos[1]};
1070 _cleanup_free_ char *tmp;
1071
1072 tmp = cescape(buf);
e736cf35 1073 log_error("invalid key/value pair in file %s on line %u,"
7c902b14 1074 "starting at character %tu ('%s')\n",
1291bc89
ZJS		 1075 filename, lineno, linepos - line + 1, tmp);
1076 if (linepos[1] == '#')
75716dd8 1077 log_error("hint: comments can only start at beginning of line");
1291bc89 1078 }
912541b0 1079 break;
e736cf35 1080 }
912541b0 1081
33502ffe 1082 if (streq(key, "ACTION")) {
912541b0 1083 if (op > OP_MATCH_MAX) {
9f6445e3 1084 log_error("invalid ACTION operation");
912541b0
KS		 1085 goto invalid;
1086 }
1087 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1088 continue;
1089 }
1090
33502ffe 1091 if (streq(key, "DEVPATH")) {
912541b0 1092 if (op > OP_MATCH_MAX) {
9f6445e3 1093 log_error("invalid DEVPATH operation");
912541b0
KS		 1094 goto invalid;
1095 }
1096 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1097 continue;
1098 }
1099
33502ffe 1100 if (streq(key, "KERNEL")) {
912541b0 1101 if (op > OP_MATCH_MAX) {
9f6445e3 1102 log_error("invalid KERNEL operation");
912541b0
KS		 1103 goto invalid;
1104 }
1105 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1106 continue;
1107 }
1108
33502ffe 1109 if (streq(key, "SUBSYSTEM")) {
912541b0 1110 if (op > OP_MATCH_MAX) {
9f6445e3 1111 log_error("invalid SUBSYSTEM operation");
912541b0
KS		 1112 goto invalid;
1113 }
1114 /* bus, class, subsystem events should all be the same */
33502ffe
KS		 1115 if (streq(value, "subsystem") ||
1116 streq(value, "bus") ||
1117 streq(value, "class")) {
1118 if (streq(value, "bus") || streq(value, "class"))
9f6445e3 1119 log_error("'%s' must be specified as 'subsystem' "
912541b0
KS		 1120 "please fix it in %s:%u", value, filename, lineno);
1121 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1122 } else
1123 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1124 continue;
1125 }
1126
33502ffe 1127 if (streq(key, "DRIVER")) {
912541b0 1128 if (op > OP_MATCH_MAX) {
9f6445e3 1129 log_error("invalid DRIVER operation");
912541b0
KS		 1130 goto invalid;
1131 }
1132 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1133 continue;
1134 }
1135
33502ffe 1136 if (startswith(key, "ATTR{")) {
f8294e41 1137 attr = get_key_attribute(rules->udev, key + strlen("ATTR"));
912541b0 1138 if (attr == NULL) {
9f6445e3 1139 log_error("error parsing ATTR attribute");
912541b0
KS		 1140 goto invalid;
1141 }
1142 if (op < OP_MATCH_MAX) {
1143 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1144 } else {
1145 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1146 }
1147 continue;
1148 }
1149
c26547d6 1150 if (startswith(key, "SECLABEL{")) {
f8294e41 1151 attr = get_key_attribute(rules->udev, key + strlen("SECLABEL"));
c26547d6 1152 if (!attr) {
9f6445e3 1153 log_error("error parsing SECLABEL attribute");
c26547d6
KS		 1154 goto invalid;
1155 }
1156
1157 rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
1158 continue;
1159 }
1160
33502ffe 1161 if (streq(key, "KERNELS")) {
912541b0 1162 if (op > OP_MATCH_MAX) {
9f6445e3 1163 log_error("invalid KERNELS operation");
912541b0
KS		 1164 goto invalid;
1165 }
1166 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1167 continue;
1168 }
1169
33502ffe 1170 if (streq(key, "SUBSYSTEMS")) {
912541b0 1171 if (op > OP_MATCH_MAX) {
9f6445e3 1172 log_error("invalid SUBSYSTEMS operation");
912541b0
KS		 1173 goto invalid;
1174 }
1175 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1176 continue;
1177 }
1178
33502ffe 1179 if (streq(key, "DRIVERS")) {
912541b0 1180 if (op > OP_MATCH_MAX) {
9f6445e3 1181 log_error("invalid DRIVERS operation");
912541b0
KS		 1182 goto invalid;
1183 }
1184 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1185 continue;
1186 }
1187
33502ffe 1188 if (startswith(key, "ATTRS{")) {
912541b0 1189 if (op > OP_MATCH_MAX) {
9f6445e3 1190 log_error("invalid ATTRS operation");
912541b0
KS		 1191 goto invalid;
1192 }
f8294e41 1193 attr = get_key_attribute(rules->udev, key + strlen("ATTRS"));
912541b0 1194 if (attr == NULL) {
9f6445e3 1195 log_error("error parsing ATTRS attribute");
912541b0
KS		 1196 goto invalid;
1197 }
33502ffe 1198 if (startswith(attr, "device/"))
baa30fbc 1199 log_error("the 'device' link may not be available in a future kernel, "
912541b0
KS		 1200 "please fix it in %s:%u", filename, lineno);
1201 else if (strstr(attr, "../") != NULL)
baa30fbc 1202 log_error("do not reference parent sysfs directories directly, "
912541b0
KS		 1203 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1204 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1205 continue;
1206 }
1207
33502ffe 1208 if (streq(key, "TAGS")) {
912541b0 1209 if (op > OP_MATCH_MAX) {
9f6445e3 1210 log_error("invalid TAGS operation");
912541b0
KS		 1211 goto invalid;
1212 }
1213 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1214 continue;
1215 }
1216
33502ffe 1217 if (startswith(key, "ENV{")) {
f8294e41 1218 attr = get_key_attribute(rules->udev, key + strlen("ENV"));
912541b0 1219 if (attr == NULL) {
9f6445e3 1220 log_error("error parsing ENV attribute");
912541b0
KS		 1221 goto invalid;
1222 }
1223 if (op < OP_MATCH_MAX) {
1224 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1225 goto invalid;
1226 } else {
1227 static const char *blacklist[] = {
1228 "ACTION",
1229 "SUBSYSTEM",
1230 "DEVTYPE",
1231 "MAJOR",
1232 "MINOR",
1233 "DRIVER",
1234 "IFINDEX",
1235 "DEVNAME",
1236 "DEVLINKS",
1237 "DEVPATH",
1238 "TAGS",
1239 };
1240 unsigned int i;
1241
395ea978
KS		 1242 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1243 if (!streq(attr, blacklist[i]))
912541b0 1244 continue;
9f6445e3 1245 log_error("invalid ENV attribute, '%s' can not be set %s:%u", attr, filename, lineno);
395ea978
KS		 1246 goto invalid;
1247 }
912541b0
KS		 1248 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1249 goto invalid;
1250 }
1251 continue;
1252 }
1253
33502ffe 1254 if (streq(key, "TAG")) {
912541b0
KS		 1255 if (op < OP_MATCH_MAX)
1256 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1257 else
1258 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1259 continue;
1260 }
1261
33502ffe 1262 if (streq(key, "PROGRAM")) {
912541b0
KS		 1263 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1264 continue;
1265 }
1266
33502ffe 1267 if (streq(key, "RESULT")) {
912541b0 1268 if (op > OP_MATCH_MAX) {
9f6445e3 1269 log_error("invalid RESULT operation");
912541b0
KS		 1270 goto invalid;
1271 }
1272 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1273 continue;
1274 }
1275
33502ffe 1276 if (startswith(key, "IMPORT")) {
f8294e41 1277 attr = get_key_attribute(rules->udev, key + strlen("IMPORT"));
912541b0 1278 if (attr == NULL) {
9f6445e3 1279 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno);
912541b0
KS		 1280 continue;
1281 }
33502ffe 1282 if (streq(attr, "program")) {
912541b0
KS		 1283 /* find known built-in command */
1284 if (value[0] != '/') {
1285 enum udev_builtin_cmd cmd;
1286
1287 cmd = udev_builtin_lookup(value);
1288 if (cmd < UDEV_BUILTIN_MAX) {
9f6445e3 1289 log_debug("IMPORT found builtin '%s', replacing %s:%u",
baa30fbc 1290 value, filename, lineno);
912541b0
KS		 1291 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1292 continue;
1293 }
1294 }
912541b0 1295 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
33502ffe 1296 } else if (streq(attr, "builtin")) {
912541b0
KS		 1297 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1298
912541b0
KS		 1299 if (cmd < UDEV_BUILTIN_MAX)
1300 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1301 else
9f6445e3 1302 log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
33502ffe 1303 } else if (streq(attr, "file")) {
912541b0 1304 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
33502ffe 1305 } else if (streq(attr, "db")) {
912541b0 1306 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
33502ffe 1307 } else if (streq(attr, "cmdline")) {
912541b0 1308 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
33502ffe 1309 } else if (streq(attr, "parent")) {
912541b0 1310 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
83cd6b75 1311 } else
9f6445e3 1312 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u", filename, lineno);
912541b0
KS		 1313 continue;
1314 }
1315
33502ffe 1316 if (startswith(key, "TEST")) {
912541b0
KS		 1317 mode_t mode = 0;
1318
1319 if (op > OP_MATCH_MAX) {
9f6445e3 1320 log_error("invalid TEST operation");
912541b0
KS		 1321 goto invalid;
1322 }
f8294e41 1323 attr = get_key_attribute(rules->udev, key + strlen("TEST"));
912541b0
KS		 1324 if (attr != NULL) {
1325 mode = strtol(attr, NULL, 8);
1326 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1327 } else {
1328 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1329 }
1330 continue;
1331 }
1332
33502ffe 1333 if (startswith(key, "RUN")) {
f8294e41 1334 attr = get_key_attribute(rules->udev, key + strlen("RUN"));
83cd6b75
KS		 1335 if (attr == NULL)
1336 attr = "program";
1337
33502ffe 1338 if (streq(attr, "builtin")) {
83cd6b75
KS		 1339 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1340
1341 if (cmd < UDEV_BUILTIN_MAX)
1342 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1343 else
9f6445e3 1344 log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
33502ffe 1345 } else if (streq(attr, "program")) {
83cd6b75
KS		 1346 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1347
83cd6b75
KS		 1348 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1349 } else {
9f6445e3 1350 log_error("RUN{} unknown type, ignoring RUN %s:%u", filename, lineno);
83cd6b75
KS		 1351 }
1352
912541b0
KS		 1353 continue;
1354 }
1355
33502ffe 1356 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
912541b0
KS		 1357 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1358 continue;
1359 }
1360
33502ffe 1361 if (streq(key, "LABEL")) {
915bf0f6 1362 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
912541b0
KS		 1363 continue;
1364 }
1365
33502ffe 1366 if (streq(key, "GOTO")) {
912541b0
KS		 1367 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1368 continue;
1369 }
1370
33502ffe 1371 if (startswith(key, "NAME")) {
912541b0
KS		 1372 if (op < OP_MATCH_MAX) {
1373 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1374 } else {
33502ffe 1375 if (streq(value, "%k")) {
baa30fbc 1376 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
912541b0
KS		 1377 "please remove it from %s:%u\n", filename, lineno);
1378 continue;
1379 }
1380 if (value[0] == '\0') {
baa30fbc
KS		 1381 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1382 "please remove it from %s:%u\n", filename, lineno);
912541b0
KS		 1383 continue;
1384 }
1385 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1386 }
1387 rule_tmp.rule.rule.can_set_name = true;
1388 continue;
1389 }
1390
8a173387
KS		 1391 if (streq(key, "SYMLINK")) {
1392 if (op < OP_MATCH_MAX)
912541b0 1393 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
8a173387
KS		 1394 else
1395 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
912541b0
KS		 1396 rule_tmp.rule.rule.can_set_name = true;
1397 continue;
1398 }
1399
33502ffe 1400 if (streq(key, "OWNER")) {
912541b0
KS		 1401 uid_t uid;
1402 char *endptr;
1403
1404 uid = strtoul(value, &endptr, 10);
1405 if (endptr[0] == '\0') {
1406 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1407 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1408 uid = add_uid(rules, value);
1409 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1410 } else if (rules->resolve_names >= 0) {
1411 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1412 }
1413 rule_tmp.rule.rule.can_set_name = true;
1414 continue;
1415 }
1416
33502ffe 1417 if (streq(key, "GROUP")) {
912541b0
KS		 1418 gid_t gid;
1419 char *endptr;
1420
1421 gid = strtoul(value, &endptr, 10);
1422 if (endptr[0] == '\0') {
1423 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1424 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1425 gid = add_gid(rules, value);
1426 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1427 } else if (rules->resolve_names >= 0) {
1428 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1429 }
1430 rule_tmp.rule.rule.can_set_name = true;
1431 continue;
1432 }
1433
33502ffe 1434 if (streq(key, "MODE")) {
912541b0
KS		 1435 mode_t mode;
1436 char *endptr;
1437
1438 mode = strtol(value, &endptr, 8);
1439 if (endptr[0] == '\0')
1440 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1441 else
1442 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1443 rule_tmp.rule.rule.can_set_name = true;
1444 continue;
1445 }
1446
33502ffe 1447 if (streq(key, "OPTIONS")) {
912541b0
KS		 1448 const char *pos;
1449
1450 pos = strstr(value, "link_priority=");
1451 if (pos != NULL) {
1452 int prio = atoi(&pos[strlen("link_priority=")]);
1453
1454 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
912541b0
KS		 1455 }
1456
912541b0
KS		 1457 if (pos != NULL) {
1458 pos = &pos[strlen("string_escape=")];
33502ffe 1459 if (startswith(pos, "none"))
912541b0 1460 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
33502ffe 1461 else if (startswith(pos, "replace"))
912541b0
KS		 1462 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1463 }
1464
1465 pos = strstr(value, "db_persist");
1466 if (pos != NULL)
1467 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1468
1469 pos = strstr(value, "nowatch");
1470 if (pos != NULL) {
1471 const int off = 0;
1472
1473 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
912541b0
KS		 1474 } else {
1475 pos = strstr(value, "watch");
1476 if (pos != NULL) {
1477 const int on = 1;
1478
1479 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
912541b0
KS		 1480 }
1481 }
1482
1483 pos = strstr(value, "static_node=");
1484 if (pos != NULL) {
1485 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1486 rule_tmp.rule.rule.has_static_node = true;
1487 }
1488
1489 continue;
1490 }
1491
9f6445e3 1492 log_error("unknown key '%s' in %s:%u", key, filename, lineno);
912541b0
KS		 1493 goto invalid;
1494 }
1495
1496 /* add rule token */
1497 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1498 if (add_token(rules, &rule_tmp.rule) != 0)
1499 goto invalid;
1500
1501 /* add tokens to list, sorted by type */
1502 if (sort_token(rules, &rule_tmp) != 0)
1503 goto invalid;
1504
1505 return 0;
c7521974 1506invalid:
9f6445e3 1507 log_error("invalid rule '%s:%u'", filename, lineno);
912541b0 1508 return -1;
c7521974
KS		 1509}
1510
775f8b3c 1511static int parse_file(struct udev_rules *rules, const char *filename)
c7521974 1512{
912541b0
KS		 1513 FILE *f;
1514 unsigned int first_token;
775f8b3c 1515 unsigned int filename_off;
912541b0
KS		 1516 char line[UTIL_LINE_SIZE];
1517 int line_nr = 0;
1518 unsigned int i;
1519
ed88bcfb
ZJS		 1520 f = fopen(filename, "re");
1521 if (!f) {
1522 if (errno == ENOENT)
1523 return 0;
1524 else
1525 return -errno;
775f8b3c 1526 }
912541b0 1527
ed88bcfb
ZJS		 1528 if (null_or_empty_fd(fileno(f))) {
1529 log_debug("Skipping empty file: %s", filename);
1530 return 0;
1531 } else
1532 log_debug("Reading rules file: %s", filename);
912541b0
KS		 1533
1534 first_token = rules->token_cur;
915bf0f6 1535 filename_off = rules_add_string(rules, filename);
912541b0
KS		 1536
1537 while (fgets(line, sizeof(line), f) != NULL) {
1538 char *key;
1539 size_t len;
1540
1541 /* skip whitespace */
1542 line_nr++;
1543 key = line;
1544 while (isspace(key[0]))
1545 key++;
1546
1547 /* comment */
1548 if (key[0] == '#')
1549 continue;
1550
1551 len = strlen(line);
1552 if (len < 3)
1553 continue;
1554
1555 /* continue reading if backslash+newline is found */
1556 while (line[len-2] == '\\') {
1557 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1558 break;
1559 if (strlen(&line[len-2]) < 2)
1560 break;
1561 line_nr++;
1562 len = strlen(line);
1563 }
1564
1565 if (len+1 >= sizeof(line)) {
9f6445e3 1566 log_error("line too long '%s':%u, ignored", filename, line_nr);
912541b0
KS		 1567 continue;
1568 }
1569 add_rule(rules, key, filename, filename_off, line_nr);
1570 }
1571 fclose(f);
1572
1573 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1574 for (i = first_token+1; i < rules->token_cur; i++) {
1575 if (rules->tokens[i].type == TK_A_GOTO) {
915bf0f6 1576 char *label = rules_str(rules, rules->tokens[i].key.value_off);
912541b0
KS		 1577 unsigned int j;
1578
1579 for (j = i+1; j < rules->token_cur; j++) {
1580 if (rules->tokens[j].type != TK_RULE)
1581 continue;
1582 if (rules->tokens[j].rule.label_off == 0)
1583 continue;
915bf0f6 1584 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
912541b0
KS		 1585 continue;
1586 rules->tokens[i].key.rule_goto = j;
1587 break;
1588 }
1589 if (rules->tokens[i].key.rule_goto == 0)
9f6445e3 1590 log_error("GOTO '%s' has no matching label in: '%s'", label, filename);
912541b0
KS		 1591 }
1592 }
1593 return 0;
c7521974
KS		 1594}
1595
d7ddce18 1596struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
c7521974 1597{
912541b0
KS		 1598 struct udev_rules *rules;
1599 struct udev_list file_list;
912541b0 1600 struct token end_token;
775f8b3c
KS		 1601 char **files, **f;
1602 int r;
912541b0 1603
955d98c9 1604 rules = new0(struct udev_rules, 1);
912541b0
KS		 1605 if (rules == NULL)
1606 return NULL;
1607 rules->udev = udev;
1608 rules->resolve_names = resolve_names;
1609 udev_list_init(udev, &file_list, true);
1610
1611 /* init token array and string buffer */
1612 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
0820a4f0
VP		 1613 if (rules->tokens == NULL)
1614 return udev_rules_unref(rules);
912541b0
KS		 1615 rules->token_max = PREALLOC_TOKEN;
1616
915bf0f6
KS		 1617 rules->strbuf = strbuf_new();
1618 if (!rules->strbuf)
0820a4f0
VP		 1619 return udev_rules_unref(rules);
1620
3b8c1cb0
KS		 1621 udev_rules_check_timestamp(rules);
1622
2ad8416d 1623 r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs);
775f8b3c 1624 if (r < 0) {
9f6445e3 1625 log_error("failed to enumerate rules files: %s", strerror(-r));
0820a4f0 1626 return udev_rules_unref(rules);
912541b0
KS		 1627 }
1628
775f8b3c
KS		 1629 /*
1630 * The offset value in the rules strct is limited; add all
1631 * rules file names to the beginning of the string buffer.
1632 */
1633 STRV_FOREACH(f, files)
915bf0f6 1634 rules_add_string(rules, *f);
912541b0 1635
775f8b3c
KS		 1636 STRV_FOREACH(f, files)
1637 parse_file(rules, *f);
1638
1639 strv_free(files);
912541b0 1640
29804cc1 1641 memzero(&end_token, sizeof(struct token));
912541b0
KS		 1642 end_token.type = TK_END;
1643 add_token(rules, &end_token);
9f6445e3 1644 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings",
915bf0f6 1645 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
912541b0 1646
915bf0f6 1647 /* cleanup temporary strbuf data */
9f6445e3 1648 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used",
915bf0f6
KS		 1649 rules->strbuf->in_count, rules->strbuf->in_len,
1650 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1651 strbuf_complete(rules->strbuf);
912541b0
KS		 1652
1653 /* cleanup uid/gid cache */
1654 free(rules->uids);
1655 rules->uids = NULL;
1656 rules->uids_cur = 0;
1657 rules->uids_max = 0;
1658 free(rules->gids);
1659 rules->gids = NULL;
1660 rules->gids_cur = 0;
1661 rules->gids_max = 0;
1662
1663 dump_rules(rules);
1664 return rules;
c7521974
KS		 1665}
1666
7c85d636 1667struct udev_rules *udev_rules_unref(struct udev_rules *rules)
c7521974 1668{
912541b0
KS		 1669 if (rules == NULL)
1670 return NULL;
1671 free(rules->tokens);
915bf0f6 1672 strbuf_cleanup(rules->strbuf);
912541b0
KS		 1673 free(rules->uids);
1674 free(rules->gids);
1675 free(rules);
1676 return NULL;
c7521974 1677}
6880b25d 1678
6ada823a
KS		 1679bool udev_rules_check_timestamp(struct udev_rules *rules)
1680{
5c11fbe3
KS		 1681 if (!rules)
1682 return false;
1683
2ad8416d 1684 return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true);
6ada823a
KS		 1685}
1686
6880b25d
KS		 1687static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1688{
915bf0f6 1689 char *key_value = rules_str(rules, token->key.value_off);
912541b0
KS		 1690 char *pos;
1691 bool match = false;
1692
1693 if (val == NULL)
1694 val = "";
1695
1696 switch (token->key.glob) {
1697 case GL_PLAIN:
33502ffe 1698 match = (streq(key_value, val));
912541b0
KS		 1699 break;
1700 case GL_GLOB:
1701 match = (fnmatch(key_value, val, 0) == 0);
1702 break;
1703 case GL_SPLIT:
1704 {
33502ffe 1705 const char *s;
912541b0
KS		 1706 size_t len;
1707
915bf0f6 1708 s = rules_str(rules, token->key.value_off);
912541b0
KS		 1709 len = strlen(val);
1710 for (;;) {
1711 const char *next;
1712
33502ffe 1713 next = strchr(s, '|');
912541b0 1714 if (next != NULL) {
33502ffe 1715 size_t matchlen = (size_t)(next - s);
912541b0 1716
641906e9 1717 match = (matchlen == len && strneq(s, val, matchlen));
912541b0
KS		 1718 if (match)
1719 break;
1720 } else {
33502ffe 1721 match = (streq(s, val));
912541b0
KS		 1722 break;
1723 }
33502ffe 1724 s = &next[1];
912541b0
KS		 1725 }
1726 break;
1727 }
1728 case GL_SPLIT_GLOB:
1729 {
1730 char value[UTIL_PATH_SIZE];
1731
d5a89d7d 1732 strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
912541b0
KS		 1733 key_value = value;
1734 while (key_value != NULL) {
1735 pos = strchr(key_value, '|');
1736 if (pos != NULL) {
1737 pos[0] = '\0';
1738 pos = &pos[1];
1739 }
912541b0
KS		 1740 match = (fnmatch(key_value, val, 0) == 0);
1741 if (match)
1742 break;
1743 key_value = pos;
1744 }
1745 break;
1746 }
1747 case GL_SOMETHING:
1748 match = (val[0] != '\0');
1749 break;
1750 case GL_UNSET:
1751 return -1;
1752 }
1753
baa30fbc 1754 if (match && (token->key.op == OP_MATCH))
912541b0 1755 return 0;
baa30fbc 1756 if (!match && (token->key.op == OP_NOMATCH))
912541b0 1757 return 0;
912541b0 1758 return -1;
6880b25d
KS		 1759}
1760
1761static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1762{
912541b0
KS		 1763 const char *name;
1764 char nbuf[UTIL_NAME_SIZE];
1765 const char *value;
1766 char vbuf[UTIL_NAME_SIZE];
1767 size_t len;
1768
915bf0f6 1769 name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1770 switch (cur->key.attrsubst) {
1771 case SB_FORMAT:
1772 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1773 name = nbuf;
1774 /* fall through */
1775 case SB_NONE:
1776 value = udev_device_get_sysattr_value(dev, name);
1777 if (value == NULL)
1778 return -1;
1779 break;
1780 case SB_SUBSYS:
1781 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1782 return -1;
1783 value = vbuf;
1784 break;
1785 default:
1786 return -1;
1787 }
1788
1789 /* remove trailing whitespace, if not asked to match for it */
1790 len = strlen(value);
1791 if (len > 0 && isspace(value[len-1])) {
1792 const char *key_value;
1793 size_t klen;
1794
915bf0f6 1795 key_value = rules_str(rules, cur->key.value_off);
912541b0
KS		 1796 klen = strlen(key_value);
1797 if (klen > 0 && !isspace(key_value[klen-1])) {
1798 if (value != vbuf) {
d5a89d7d 1799 strscpy(vbuf, sizeof(vbuf), value);
912541b0
KS		 1800 value = vbuf;
1801 }
1802 while (len > 0 && isspace(vbuf[--len]))
1803 vbuf[len] = '\0';
912541b0
KS		 1804 }
1805 }
1806
1807 return match_key(rules, cur, value);
6880b25d
KS		 1808}
1809
1810enum escape_type {
912541b0
KS		 1811 ESCAPE_UNSET,
1812 ESCAPE_NONE,
1813 ESCAPE_REPLACE,
6880b25d
KS		 1814};
1815
dd5eddd2
KS		 1816int udev_rules_apply_to_event(struct udev_rules *rules,
1817 struct udev_event *event,
1818 usec_t timeout_usec,
1819 const sigset_t *sigmask) {
912541b0
KS		 1820 struct token *cur;
1821 struct token *rule;
1822 enum escape_type esc = ESCAPE_UNSET;
1823 bool can_set_name;
1824
1825 if (rules->tokens == NULL)
1826 return -1;
1827
33502ffe 1828 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
912541b0
KS		 1829 (major(udev_device_get_devnum(event->dev)) > 0 ||
1830 udev_device_get_ifindex(event->dev) > 0));
1831
1832 /* loop through token list, match, run actions or forward to next rule */
1833 cur = &rules->tokens[0];
1834 rule = cur;
1835 for (;;) {
1836 dump_token(rules, cur);
1837 switch (cur->type) {
1838 case TK_RULE:
1839 /* current rule */
1840 rule = cur;
1841 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1842 if (!can_set_name && rule->rule.can_set_name)
1843 goto nomatch;
1844 esc = ESCAPE_UNSET;
1845 break;
1846 case TK_M_ACTION:
1847 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1848 goto nomatch;
1849 break;
1850 case TK_M_DEVPATH:
1851 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1852 goto nomatch;
1853 break;
1854 case TK_M_KERNEL:
1855 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1856 goto nomatch;
1857 break;
1858 case TK_M_DEVLINK: {
912541b0
KS		 1859 struct udev_list_entry *list_entry;
1860 bool match = false;
1861
1862 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1863 const char *devlink;
1864
4cb72937 1865 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
912541b0
KS		 1866 if (match_key(rules, cur, devlink) == 0) {
1867 match = true;
1868 break;
1869 }
1870 }
1871 if (!match)
1872 goto nomatch;
1873 break;
1874 }
1875 case TK_M_NAME:
1876 if (match_key(rules, cur, event->name) != 0)
1877 goto nomatch;
1878 break;
1879 case TK_M_ENV: {
915bf0f6 1880 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 1881 const char *value;
1882
1883 value = udev_device_get_property_value(event->dev, key_name);
baa30fbc 1884 if (value == NULL)
912541b0 1885 value = "";
912541b0
KS		 1886 if (match_key(rules, cur, value))
1887 goto nomatch;
1888 break;
1889 }
1890 case TK_M_TAG: {
1891 struct udev_list_entry *list_entry;
1892 bool match = false;
1893
1894 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
915bf0f6 1895 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
912541b0
KS		 1896 match = true;
1897 break;
1898 }
1899 }
1900 if (!match && (cur->key.op != OP_NOMATCH))
1901 goto nomatch;
1902 break;
1903 }
1904 case TK_M_SUBSYSTEM:
1905 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1906 goto nomatch;
1907 break;
1908 case TK_M_DRIVER:
1909 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1910 goto nomatch;
1911 break;
1912 case TK_M_WAITFOR: {
1913 char filename[UTIL_PATH_SIZE];
1914 int found;
1915
915bf0f6 1916 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
912541b0
KS		 1917 found = (wait_for_file(event->dev, filename, 10) == 0);
1918 if (!found && (cur->key.op != OP_NOMATCH))
1919 goto nomatch;
1920 break;
1921 }
1922 case TK_M_ATTR:
1923 if (match_attr(rules, event->dev, event, cur) != 0)
1924 goto nomatch;
1925 break;
1926 case TK_M_KERNELS:
1927 case TK_M_SUBSYSTEMS:
1928 case TK_M_DRIVERS:
1929 case TK_M_ATTRS:
1930 case TK_M_TAGS: {
1931 struct token *next;
1932
1933 /* get whole sequence of parent matches */
1934 next = cur;
1935 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1936 next++;
1937
1938 /* loop over parents */
1939 event->dev_parent = event->dev;
1940 for (;;) {
1941 struct token *key;
1942
912541b0
KS		 1943 /* loop over sequence of parent match keys */
1944 for (key = cur; key < next; key++ ) {
1945 dump_token(rules, key);
1946 switch(key->type) {
1947 case TK_M_KERNELS:
1948 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1949 goto try_parent;
1950 break;
1951 case TK_M_SUBSYSTEMS:
1952 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1953 goto try_parent;
1954 break;
1955 case TK_M_DRIVERS:
1956 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1957 goto try_parent;
1958 break;
1959 case TK_M_ATTRS:
1960 if (match_attr(rules, event->dev_parent, event, key) != 0)
1961 goto try_parent;
1962 break;
1963 case TK_M_TAGS: {
915bf0f6 1964 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
912541b0
KS		 1965
1966 if (match && key->key.op == OP_NOMATCH)
1967 goto try_parent;
1968 if (!match && key->key.op == OP_MATCH)
1969 goto try_parent;
1970 break;
1971 }
1972 default:
1973 goto nomatch;
1974 }
912541b0 1975 }
912541b0
KS		 1976 break;
1977
1978 try_parent:
1979 event->dev_parent = udev_device_get_parent(event->dev_parent);
1980 if (event->dev_parent == NULL)
1981 goto nomatch;
1982 }
1983 /* move behind our sequence of parent match keys */
1984 cur = next;
1985 continue;
1986 }
1987 case TK_M_TEST: {
1988 char filename[UTIL_PATH_SIZE];
1989 struct stat statbuf;
1990 int match;
1991
915bf0f6 1992 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
912541b0
KS		 1993 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
1994 if (filename[0] != '/') {
1995 char tmp[UTIL_PATH_SIZE];
1996
d5a89d7d
KS		 1997 strscpy(tmp, sizeof(tmp), filename);
1998 strscpyl(filename, sizeof(filename),
912541b0
KS		 1999 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2000 }
2001 }
2002 attr_subst_subdir(filename, sizeof(filename));
2003
2004 match = (stat(filename, &statbuf) == 0);
baa30fbc 2005 if (match && cur->key.mode > 0)
912541b0 2006 match = ((statbuf.st_mode & cur->key.mode) > 0);
912541b0
KS		 2007 if (match && cur->key.op == OP_NOMATCH)
2008 goto nomatch;
2009 if (!match && cur->key.op == OP_MATCH)
2010 goto nomatch;
2011 break;
2012 }
912541b0
KS		 2013 case TK_M_PROGRAM: {
2014 char program[UTIL_PATH_SIZE];
2015 char **envp;
209b031e 2016 char result[UTIL_LINE_SIZE];
912541b0
KS		 2017
2018 free(event->program_result);
2019 event->program_result = NULL;
915bf0f6 2020 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
912541b0 2021 envp = udev_device_get_properties_envp(event->dev);
9f6445e3 2022 log_debug("PROGRAM '%s' %s:%u",
baa30fbc 2023 program,
915bf0f6 2024 rules_str(rules, rule->rule.filename_off),
baa30fbc 2025 rule->rule.filename_line);
912541b0 2026
dd5eddd2 2027 if (udev_event_spawn(event, timeout_usec, program, envp, sigmask, result, sizeof(result)) < 0) {
912541b0
KS		 2028 if (cur->key.op != OP_NOMATCH)
2029 goto nomatch;
2030 } else {
2031 int count;
2032
2033 util_remove_trailing_chars(result, '\n');
2034 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2035 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2036 if (count > 0)
9f6445e3 2037 log_debug("%i character(s) replaced" , count);
912541b0
KS		 2038 }
2039 event->program_result = strdup(result);
912541b0
KS		 2040 if (cur->key.op == OP_NOMATCH)
2041 goto nomatch;
2042 }
2043 break;
2044 }
2045 case TK_M_IMPORT_FILE: {
2046 char import[UTIL_PATH_SIZE];
2047
915bf0f6 2048 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
912541b0
KS		 2049 if (import_file_into_properties(event->dev, import) != 0)
2050 if (cur->key.op != OP_NOMATCH)
2051 goto nomatch;
2052 break;
2053 }
2054 case TK_M_IMPORT_PROG: {
2055 char import[UTIL_PATH_SIZE];
2056
915bf0f6 2057 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
9f6445e3 2058 log_debug("IMPORT '%s' %s:%u",
baa30fbc 2059 import,
915bf0f6 2060 rules_str(rules, rule->rule.filename_off),
baa30fbc 2061 rule->rule.filename_line);
912541b0 2062
dd5eddd2 2063 if (import_program_into_properties(event, timeout_usec, import, sigmask) != 0)
912541b0
KS		 2064 if (cur->key.op != OP_NOMATCH)
2065 goto nomatch;
2066 break;
2067 }
2068 case TK_M_IMPORT_BUILTIN: {
2069 char command[UTIL_PATH_SIZE];
2070
2071 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2072 /* check if we ran already */
2073 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
9f6445e3 2074 log_debug("IMPORT builtin skip '%s' %s:%u",
baa30fbc 2075 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2076 rules_str(rules, rule->rule.filename_off),
baa30fbc 2077 rule->rule.filename_line);
912541b0
KS		 2078 /* return the result from earlier run */
2079 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2080 if (cur->key.op != OP_NOMATCH)
2081 goto nomatch;
2082 break;
2083 }
2084 /* mark as ran */
2085 event->builtin_run |= (1 << cur->key.builtin_cmd);
2086 }
2087
915bf0f6 2088 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
9f6445e3 2089 log_debug("IMPORT builtin '%s' %s:%u",
baa30fbc 2090 udev_builtin_name(cur->key.builtin_cmd),
915bf0f6 2091 rules_str(rules, rule->rule.filename_off),
baa30fbc 2092 rule->rule.filename_line);
912541b0
KS		 2093
2094 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2095 /* remember failure */
9f6445e3 2096 log_debug("IMPORT builtin '%s' returned non-zero",
baa30fbc 2097 udev_builtin_name(cur->key.builtin_cmd));
912541b0
KS		 2098 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2099 if (cur->key.op != OP_NOMATCH)
2100 goto nomatch;
2101 }
2102 break;
2103 }
2104 case TK_M_IMPORT_DB: {
915bf0f6 2105 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2106 const char *value;
2107
2108 value = udev_device_get_property_value(event->dev_db, key);
2109 if (value != NULL) {
2110 struct udev_list_entry *entry;
2111
2112 entry = udev_device_add_property(event->dev, key, value);
2113 udev_list_entry_set_num(entry, true);
2114 } else {
2115 if (cur->key.op != OP_NOMATCH)
2116 goto nomatch;
2117 }
2118 break;
2119 }
2120 case TK_M_IMPORT_CMDLINE: {
2121 FILE *f;
2122 bool imported = false;
2123
47ef94ac 2124 f = fopen("/proc/cmdline", "re");
912541b0
KS		 2125 if (f != NULL) {
2126 char cmdline[4096];
2127
2128 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
915bf0f6 2129 const char *key = rules_str(rules, cur->key.value_off);
912541b0
KS		 2130 char *pos;
2131
2132 pos = strstr(cmdline, key);
2133 if (pos != NULL) {
2134 struct udev_list_entry *entry;
2135
2136 pos += strlen(key);
2137 if (pos[0] == '\0' || isspace(pos[0])) {
2138 /* we import simple flags as 'FLAG=1' */
2139 entry = udev_device_add_property(event->dev, key, "1");
2140 udev_list_entry_set_num(entry, true);
2141 imported = true;
2142 } else if (pos[0] == '=') {
2143 const char *value;
2144
2145 pos++;
2146 value = pos;
2147 while (pos[0] != '\0' && !isspace(pos[0]))
2148 pos++;
2149 pos[0] = '\0';
2150 entry = udev_device_add_property(event->dev, key, value);
2151 udev_list_entry_set_num(entry, true);
2152 imported = true;
2153 }
2154 }
2155 }
2156 fclose(f);
2157 }
2158 if (!imported && cur->key.op != OP_NOMATCH)
2159 goto nomatch;
2160 break;
2161 }
2162 case TK_M_IMPORT_PARENT: {
2163 char import[UTIL_PATH_SIZE];
2164
915bf0f6 2165 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
912541b0
KS		 2166 if (import_parent_into_properties(event->dev, import) != 0)
2167 if (cur->key.op != OP_NOMATCH)
2168 goto nomatch;
2169 break;
2170 }
2171 case TK_M_RESULT:
2172 if (match_key(rules, cur, event->program_result) != 0)
2173 goto nomatch;
2174 break;
2175 case TK_A_STRING_ESCAPE_NONE:
2176 esc = ESCAPE_NONE;
2177 break;
2178 case TK_A_STRING_ESCAPE_REPLACE:
2179 esc = ESCAPE_REPLACE;
2180 break;
2181 case TK_A_DB_PERSIST:
2182 udev_device_set_db_persist(event->dev);
2183 break;
2184 case TK_A_INOTIFY_WATCH:
2185 if (event->inotify_watch_final)
2186 break;
2187 if (cur->key.op == OP_ASSIGN_FINAL)
2188 event->inotify_watch_final = true;
2189 event->inotify_watch = cur->key.watch;
2190 break;
2191 case TK_A_DEVLINK_PRIO:
2192 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2193 break;
2194 case TK_A_OWNER: {
2195 char owner[UTIL_NAME_SIZE];
2196
2197 if (event->owner_final)
2198 break;
2199 if (cur->key.op == OP_ASSIGN_FINAL)
2200 event->owner_final = true;
915bf0f6 2201 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
1edefa4f 2202 event->owner_set = true;
912541b0 2203 event->uid = util_lookup_user(event->udev, owner);
9f6445e3 2204 log_debug("OWNER %u %s:%u",
baa30fbc 2205 event->uid,
915bf0f6 2206 rules_str(rules, rule->rule.filename_off),
baa30fbc 2207 rule->rule.filename_line);
912541b0
KS		 2208 break;
2209 }
2210 case TK_A_GROUP: {
2211 char group[UTIL_NAME_SIZE];
2212
2213 if (event->group_final)
2214 break;
2215 if (cur->key.op == OP_ASSIGN_FINAL)
2216 event->group_final = true;
915bf0f6 2217 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
1edefa4f 2218 event->group_set = true;
912541b0 2219 event->gid = util_lookup_group(event->udev, group);
9f6445e3 2220 log_debug("GROUP %u %s:%u",
baa30fbc 2221 event->gid,
915bf0f6 2222 rules_str(rules, rule->rule.filename_off),
baa30fbc 2223 rule->rule.filename_line);
912541b0
KS		 2224 break;
2225 }
2226 case TK_A_MODE: {
2227 char mode_str[UTIL_NAME_SIZE];
2228 mode_t mode;
2229 char *endptr;
2230
2231 if (event->mode_final)
2232 break;
915bf0f6 2233 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
912541b0
KS		 2234 mode = strtol(mode_str, &endptr, 8);
2235 if (endptr[0] != '\0') {
9f6445e3 2236 log_error("ignoring invalid mode '%s'", mode_str);
912541b0
KS		 2237 break;
2238 }
2239 if (cur->key.op == OP_ASSIGN_FINAL)
2240 event->mode_final = true;
2241 event->mode_set = true;
2242 event->mode = mode;
9f6445e3 2243 log_debug("MODE %#o %s:%u",
baa30fbc 2244 event->mode,
915bf0f6 2245 rules_str(rules, rule->rule.filename_off),
baa30fbc 2246 rule->rule.filename_line);
912541b0
KS		 2247 break;
2248 }
2249 case TK_A_OWNER_ID:
2250 if (event->owner_final)
2251 break;
2252 if (cur->key.op == OP_ASSIGN_FINAL)
2253 event->owner_final = true;
1edefa4f 2254 event->owner_set = true;
912541b0 2255 event->uid = cur->key.uid;
9f6445e3 2256 log_debug("OWNER %u %s:%u",
baa30fbc 2257 event->uid,
915bf0f6 2258 rules_str(rules, rule->rule.filename_off),
baa30fbc 2259 rule->rule.filename_line);
912541b0
KS		 2260 break;
2261 case TK_A_GROUP_ID:
2262 if (event->group_final)
2263 break;
2264 if (cur->key.op == OP_ASSIGN_FINAL)
2265 event->group_final = true;
1edefa4f 2266 event->group_set = true;
912541b0 2267 event->gid = cur->key.gid;
9f6445e3 2268 log_debug("GROUP %u %s:%u",
baa30fbc 2269 event->gid,
915bf0f6 2270 rules_str(rules, rule->rule.filename_off),
baa30fbc 2271 rule->rule.filename_line);
912541b0
KS		 2272 break;
2273 case TK_A_MODE_ID:
2274 if (event->mode_final)
2275 break;
2276 if (cur->key.op == OP_ASSIGN_FINAL)
2277 event->mode_final = true;
2278 event->mode_set = true;
2279 event->mode = cur->key.mode;
9f6445e3 2280 log_debug("MODE %#o %s:%u",
baa30fbc 2281 event->mode,
915bf0f6 2282 rules_str(rules, rule->rule.filename_off),
baa30fbc 2283 rule->rule.filename_line);
912541b0 2284 break;
c26547d6
KS		 2285 case TK_A_SECLABEL: {
2286 const char *name, *label;
2287
2288 name = rules_str(rules, cur->key.attr_off);
2289 label = rules_str(rules, cur->key.value_off);
2290 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2291 udev_list_cleanup(&event->seclabel_list);
2292 udev_list_entry_add(&event->seclabel_list, name, label);
9f6445e3 2293 log_debug("SECLABEL{%s}='%s' %s:%u",
c26547d6
KS		 2294 name, label,
2295 rules_str(rules, rule->rule.filename_off),
2296 rule->rule.filename_line);
2297 break;
2298 }
912541b0 2299 case TK_A_ENV: {
915bf0f6
KS		 2300 const char *name = rules_str(rules, cur->key.attr_off);
2301 char *value = rules_str(rules, cur->key.value_off);
07845c14
KS		 2302 char value_new[UTIL_NAME_SIZE];
2303 const char *value_old = NULL;
2304 struct udev_list_entry *entry;
912541b0 2305
07845c14
KS		 2306 if (value[0] == '\0') {
2307 if (cur->key.op == OP_ADD)
2308 break;
912541b0 2309 udev_device_add_property(event->dev, name, NULL);
07845c14 2310 break;
912541b0 2311 }
07845c14
KS		 2312
2313 if (cur->key.op == OP_ADD)
2314 value_old = udev_device_get_property_value(event->dev, name);
2315 if (value_old) {
2316 char temp[UTIL_NAME_SIZE];
2317
2318 /* append value separated by space */
2319 udev_event_apply_format(event, value, temp, sizeof(temp));
d5a89d7d 2320 strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
07845c14
KS		 2321 } else
2322 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2323
2324 entry = udev_device_add_property(event->dev, name, value_new);
2325 /* store in db, skip private keys */
2326 if (name[0] != '.')
2327 udev_list_entry_set_num(entry, true);
912541b0
KS		 2328 break;
2329 }
2330 case TK_A_TAG: {
2331 char tag[UTIL_PATH_SIZE];
2332 const char *p;
2333
915bf0f6 2334 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
912541b0
KS		 2335 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2336 udev_device_cleanup_tags_list(event->dev);
2337 for (p = tag; *p != '\0'; p++) {
2338 if ((*p >= 'a' && *p <= 'z') ||
2339 (*p >= 'A' && *p <= 'Z') ||
2340 (*p >= '0' && *p <= '9') ||
2341 *p == '-' || *p == '_')
2342 continue;
9f6445e3 2343 log_error("ignoring invalid tag name '%s'", tag);
912541b0
KS		 2344 break;
2345 }
2346 udev_device_add_tag(event->dev, tag);
2347 break;
2348 }
2349 case TK_A_NAME: {
915bf0f6 2350 const char *name = rules_str(rules, cur->key.value_off);
0ecfcbd4 2351
912541b0
KS		 2352 char name_str[UTIL_PATH_SIZE];
2353 int count;
2354
2355 if (event->name_final)
2356 break;
2357 if (cur->key.op == OP_ASSIGN_FINAL)
2358 event->name_final = true;
2359 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2360 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2361 count = util_replace_chars(name_str, "/");
2362 if (count > 0)
9f6445e3 2363 log_debug("%i character(s) replaced", count);
912541b0 2364 }
6ada823a 2365 if (major(udev_device_get_devnum(event->dev)) &&
4cb72937 2366 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
6ada823a
KS		 2367 log_error("NAME=\"%s\" ignored, kernel device nodes "
2368 "can not be renamed; please fix it in %s:%u\n", name,
915bf0f6 2369 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
6ada823a 2370 break;
0ecfcbd4 2371 }
912541b0
KS		 2372 free(event->name);
2373 event->name = strdup(name_str);
9f6445e3 2374 log_debug("NAME '%s' %s:%u",
baa30fbc 2375 event->name,
915bf0f6 2376 rules_str(rules, rule->rule.filename_off),
baa30fbc 2377 rule->rule.filename_line);
912541b0
KS		 2378 break;
2379 }
2380 case TK_A_DEVLINK: {
2381 char temp[UTIL_PATH_SIZE];
2382 char filename[UTIL_PATH_SIZE];
2383 char *pos, *next;
2384 int count = 0;
2385
2386 if (event->devlink_final)
2387 break;
2388 if (major(udev_device_get_devnum(event->dev)) == 0)
2389 break;
2390 if (cur->key.op == OP_ASSIGN_FINAL)
2391 event->devlink_final = true;
2392 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2393 udev_device_cleanup_devlinks_list(event->dev);
2394
2395 /* allow multiple symlinks separated by spaces */
915bf0f6 2396 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
912541b0
KS		 2397 if (esc == ESCAPE_UNSET)
2398 count = util_replace_chars(temp, "/ ");
2399 else if (esc == ESCAPE_REPLACE)
2400 count = util_replace_chars(temp, "/");
2401 if (count > 0)
9f6445e3 2402 log_debug("%i character(s) replaced" , count);
912541b0
KS		 2403 pos = temp;
2404 while (isspace(pos[0]))
2405 pos++;
2406 next = strchr(pos, ' ');
2407 while (next != NULL) {
2408 next[0] = '\0';
9f6445e3 2409 log_debug("LINK '%s' %s:%u", pos,
915bf0f6 2410 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2411 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2412 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2413 while (isspace(next[1]))
2414 next++;
2415 pos = &next[1];
2416 next = strchr(pos, ' ');
2417 }
2418 if (pos[0] != '\0') {
9f6445e3 2419 log_debug("LINK '%s' %s:%u", pos,
915bf0f6 2420 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
d5a89d7d 2421 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
8a173387 2422 udev_device_add_devlink(event->dev, filename);
912541b0
KS		 2423 }
2424 break;
2425 }
2426 case TK_A_ATTR: {
915bf0f6 2427 const char *key_name = rules_str(rules, cur->key.attr_off);
912541b0
KS		 2428 char attr[UTIL_PATH_SIZE];
2429 char value[UTIL_NAME_SIZE];
2430 FILE *f;
2431
2432 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
d5a89d7d 2433 strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
912541b0
KS		 2434 attr_subst_subdir(attr, sizeof(attr));
2435
915bf0f6 2436 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
9f6445e3 2437 log_debug("ATTR '%s' writing '%s' %s:%u", attr, value,
915bf0f6 2438 rules_str(rules, rule->rule.filename_off),
baa30fbc 2439 rule->rule.filename_line);
47ef94ac 2440 f = fopen(attr, "we");
912541b0
KS		 2441 if (f != NULL) {
2442 if (fprintf(f, "%s", value) <= 0)
9f6445e3 2443 log_error("error writing ATTR{%s}: %m", attr);
912541b0
KS		 2444 fclose(f);
2445 } else {
9f6445e3 2446 log_error("error opening ATTR{%s} for writing: %m", attr);
912541b0
KS		 2447 }
2448 break;
2449 }
83cd6b75
KS		 2450 case TK_A_RUN_BUILTIN:
2451 case TK_A_RUN_PROGRAM: {
2452 struct udev_list_entry *entry;
2453
912541b0
KS		 2454 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2455 udev_list_cleanup(&event->run_list);
9f6445e3 2456 log_debug("RUN '%s' %s:%u",
915bf0f6
KS		 2457 rules_str(rules, cur->key.value_off),
2458 rules_str(rules, rule->rule.filename_off),
baa30fbc 2459 rule->rule.filename_line);
915bf0f6 2460 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
83cd6b75 2461 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
912541b0
KS		 2462 break;
2463 }
2464 case TK_A_GOTO:
2465 if (cur->key.rule_goto == 0)
2466 break;
2467 cur = &rules->tokens[cur->key.rule_goto];
2468 continue;
2469 case TK_END:
2470 return 0;
2471
2472 case TK_M_PARENTS_MIN:
2473 case TK_M_PARENTS_MAX:
2474 case TK_M_MAX:
2475 case TK_UNSET:
9f6445e3 2476 log_error("wrong type %u", cur->type);
912541b0
KS		 2477 goto nomatch;
2478 }
2479
2480 cur++;
2481 continue;
2482 nomatch:
2483 /* fast-forward to next rule */
2484 cur = rule + rule->rule.token_count;
912541b0 2485 }
6880b25d 2486}
761dfddc 2487
84b6ad70 2488int udev_rules_apply_static_dev_perms(struct udev_rules *rules)
761dfddc 2489{
912541b0
KS		 2490 struct token *cur;
2491 struct token *rule;
2492 uid_t uid = 0;
2493 gid_t gid = 0;
2494 mode_t mode = 0;
84b6ad70
TG		 2495 _cleanup_strv_free_ char **tags = NULL;
2496 char **t;
2497 FILE *f = NULL;
2498 _cleanup_free_ char *path = NULL;
2499 int r = 0;
912541b0
KS		 2500
2501 if (rules->tokens == NULL)
84b6ad70 2502 return 0;
912541b0
KS		 2503
2504 cur = &rules->tokens[0];
2505 rule = cur;
2506 for (;;) {
2507 switch (cur->type) {
2508 case TK_RULE:
2509 /* current rule */
2510 rule = cur;
2511
2512 /* skip rules without a static_node tag */
2513 if (!rule->rule.has_static_node)
2514 goto next;
2515
2516 uid = 0;
2517 gid = 0;
2518 mode = 0;
84b6ad70
TG		 2519 strv_free(tags);
2520 tags = NULL;
912541b0
KS		 2521 break;
2522 case TK_A_OWNER_ID:
2523 uid = cur->key.uid;
2524 break;
2525 case TK_A_GROUP_ID:
2526 gid = cur->key.gid;
2527 break;
2528 case TK_A_MODE_ID:
2529 mode = cur->key.mode;
84b6ad70
TG		 2530 break;
2531 case TK_A_TAG:
2532 r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
2533 if (r < 0)
2534 goto finish;
2535
912541b0
KS		 2536 break;
2537 case TK_A_STATIC_NODE: {
84b6ad70
TG		 2538 char device_node[UTIL_PATH_SIZE];
2539 char tags_dir[UTIL_PATH_SIZE];
2540 char tag_symlink[UTIL_PATH_SIZE];
912541b0
KS		 2541 struct stat stats;
2542
2543 /* we assure, that the permissions tokens are sorted before the static token */
ca2bb160 2544
84b6ad70 2545 if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
912541b0 2546 goto next;
d6f116a7 2547
84b6ad70 2548 strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
ca2bb160
KS		 2549 if (stat(device_node, &stats) != 0)
2550 break;
2551 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2552 break;
84b6ad70 2553
d6f116a7 2554 /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
84b6ad70 2555 if (tags) {
84b6ad70
TG		 2556 STRV_FOREACH(t, tags) {
2557 _cleanup_free_ char *unescaped_filename = NULL;
2558
2559 strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
2560 r = mkdir_p(tags_dir, 0755);
2561 if (r < 0) {
9f6445e3 2562 log_error("failed to create %s: %s", tags_dir, strerror(-r));
84b6ad70
TG		 2563 return r;
2564 }
2565
2566 unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
2567
2568 strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
2569 r = symlink(device_node, tag_symlink);
2570 if (r < 0 && errno != EEXIST) {
9f6445e3 2571 log_error("failed to create symlink %s -> %s: %m", tag_symlink, device_node);
84b6ad70
TG		 2572 return -errno;
2573 } else
2574 r = 0;
2575 }
2576 }
2577
15a72200
TG		 2578 /* don't touch the permissions if only the tags were set */
2579 if (mode == 0 && uid == 0 && gid == 0)
d6f116a7
KS		 2580 break;
2581
912541b0
KS		 2582 if (mode == 0) {
2583 if (gid > 0)
2584 mode = 0660;
2585 else
2586 mode = 0600;
2587 }
2588 if (mode != (stats.st_mode & 01777)) {
490f0087
TG		 2589 r = chmod(device_node, mode);
2590 if (r < 0) {
9f6445e3 2591 log_error("failed to chmod '%s' %#o", device_node, mode);
490f0087
TG		 2592 return -errno;
2593 } else
9f6445e3 2594 log_debug("chmod '%s' %#o", device_node, mode);
912541b0
KS		 2595 }
2596
2597 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
490f0087
TG		 2598 r = chown(device_node, uid, gid);
2599 if (r < 0) {
9f6445e3 2600 log_error("failed to chown '%s' %u %u ", device_node, uid, gid);
490f0087
TG		 2601 return -errno;
2602 } else
9f6445e3 2603 log_debug("chown '%s' %u %u", device_node, uid, gid);
912541b0
KS		 2604 }
2605
84b6ad70 2606 utimensat(AT_FDCWD, device_node, NULL, 0);
912541b0
KS		 2607 break;
2608 }
2609 case TK_END:
84b6ad70 2610 goto finish;
912541b0
KS		 2611 }
2612
2613 cur++;
2614 continue;
761dfddc 2615next:
912541b0
KS		 2616 /* fast-forward to next rule */
2617 cur = rule + rule->rule.token_count;
2618 continue;
2619 }
84b6ad70
TG		 2620
2621finish:
2622 if (f) {
2623 fflush(f);
2624 fchmod(fileno(f), 0644);
2625 if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
2626 r = -errno;
2627 unlink("/run/udev/static_node-tags");
2628 unlink(path);
2629 }
2630 fclose(f);
2631 }
2632
2633 return r;
761dfddc 2634}
Unnamed repository; edit this file 'description' to name the repository.